NECHTA ELEMENT BOR, 118, 116, KISLORODNING ATOM MASSASI QANCHA, 15, 16, B NECHA VALENTLI, 3, 5, 3,5 VALENTLI ELEMENTLARGA QUYIDAGILAR KIRADI, P,As,Sb,Bi, S,N,C, N NECHA VALENTLI, 1,2,3, 1,2,3,4, 1,3,5,7 VALENTLI ELEMENTLAR BU, Cl,Br,J,At, O,Cl,N, Mn NECHA VALENTLI, 1,2,3, 2,3,4,5,6,7, ELEMENTNING BOG' HOSIL QILISH IMKONIYATIGA NIMA DEYILADI, VALENTLIK, ALLOTROPIYA, P VA Ca ELEMENTLARINING NOMI, FOSFOR VA KALSIY, KALIY VA FTOR, OSH TUZINING FORMULASI, NaCl, KCl, UKOL UCHUN ISHLATADIGAN ETIL SPIRTINING FORMULASI, CH3OH, C2H5OH.

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